Exploring the Photophysical Properties of Some Dextran-Iron Oxide Nanoparticle Composites
In this study, we report the synthesis and characterization of Fe<sub>3</sub>O<sub>4</sub> nanoparticles coated with dextran. The structural and optical properties of the Dx:Fe<sub>3</sub>O<sub>4</sub> synthesized composites were investigated by Fourier Transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and UV-Vis absorption spectroscopy. For the first time in this paper, the photophysics of Dx:Fe<sub>3</sub>O<sub>4</sub> composites in water is studied using fluorescence and phosphorescence molecular spectrometry. An analysis of the absorption spectra of the Dx:Fe<sub>3</sub>O<sub>4</sub> composite reveals the broad absorption bands with maxima at wavelengths of 227 nm, 264 nm, and 340 nm. Dx:Fe<sub>3</sub>O<sub>4</sub> composite nanoparticles in water exhibit strong fluorescence with a quantum yield of 0.24% in contrast to 0.07% for dextran. Phosphorescence spectra confirm the formation of new emission bands within the Dx:Fe<sub>3</sub>O<sub>4</sub> solution evidenced by the maxima shift for both dextran and Dx:Fe<sub>3</sub>O<sub>4</sub> composites.
Authors
- Radu Tigoianu (ORCID: https://orcid.org/0009-0002-4924-4877)
- Anton Airinei (ORCID: https://orcid.org/0000-0001-5000-6513)
- Tamara Potlog (ORCID: https://orcid.org/0000-0003-1243-9371)
- Ion Lungu (ORCID: https://orcid.org/0000-0002-7117-672X)
- Carmen Gherasim (ORCID: https://orcid.org/0000-0003-3578-6499)
Institutions
- Moldova State University (MD)
Publication Details
- Journal
- Molecules
- Published
- 2025-05-23
- DOI
- https://doi.org/10.3390/molecules30112290
- Citations
- 4
- Primary Topic
- Gold and Silver Nanoparticles Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.71